batgrbproduct Analysis for Trigger=601928

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jun 18 03:05:28 EDT 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger601928/GCN5_download_cron
======================================================================

  Trigger: 00601928      Segment: 000

  BAT Trigger Time: 424679864   [s; MET]
      Trigger Stop: 424680952   [s; MET]
               UTC: 2014-06-17T06:37:31.850420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 324.790430637035   Dec: 56.9534169369178  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.36
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.36

  Flight Position:   [ source = BAT ]
    RA: 324.790430637035   Dec: 56.9534169369178  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 324.765218179972   Dec: 56.9735869192089  [deg; J2000]  
        { 21h 39m 03.7s , +56d 58' 24.9" }
         +/- 3.39494974223947 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.63741902410416 [arcmin] (formal 1-sigma fit error)
    SNR: 5.30621720626843
 
  Angular difference between Flight and Ground position is 1.464489 arcmin
 
  Partial Coding Fraction: 0.8984375    [ including projection effects ]

  Duration
     T90: 1088 +/- 
        Measured from: 0
                   to: 1088     [s; relative to TRIGTIME]
     T50: 1088 +/- 
        Measured from: 0
                   to: 1088     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1088 second)
        Measured from: 0     
                   to: 1088     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1088     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.164894   0.725478   0.016146   0.066313
           0.175089   0.177431   0.153008   0.131191 [error]
 Peak      2.164894   0.725478   0.016146   0.066313
           0.175089   0.177431   0.153008   0.131191 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 5.73e-07 3.58e-07 1.44e-07 7.77e-08 1.11e-06 1.15e-06   erg/cm2
              Error 8.68e-08 8.76e-08 7.29e-08 7.04e-08 2.18e-07 2.49e-07   erg/cm2
Peak flux Power-law 2.00e-02 7.05e-03 1.41e-03 3.36e-04 2.87e-02 2.88e-02   ph/cm2/s
              Error 3.08e-03 1.64e-03 6.97e-04 2.86e-04 4.30e-03 4.35e-03   ph/cm2/s
 
Fluence   Cutoff-PL 6.26e-07 3.15e-07 5.20e-09 1.56e-13 9.46e-07 9.46e-07   erg/cm2
              Error 9.91e-08 1.22e-07 2.66e-08 4.09e-10 1.61e-07 1.61e-07   erg/cm2
Peak flux Cutoff-PL 2.13e-02 6.70e-03 6.16e-05 9.73e-10 2.80e-02 2.80e-02   ph/cm2/s
              Error 3.44e-03 2.32e-03 2.89e-04 2.39e-06 4.07e-03 4.07e-03   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.317    0.421    -      -           8.20e-05 3.19e-05   82.960 57
CPL  -2.394    5.598      18.6    5.5      2.07e+00 0.00e+00   74.800 56
 
The chi2 of BB fit is 74.92 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.317    0.421    -      -           8.20e-05 3.19e-05   82.960 57
CPL  -2.394    5.598      18.6    5.5      2.07e+00 0.00e+00   74.800 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom
 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100 1088.000    0.000 1088.000
T90  1088.000    0.000 1088.000
T50  1088.000    0.000 1088.000
Peak 1088.000    0.000 1088.000

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  324.7652 +56.9736 0.0360   13.9  118.3       2.9324     5.3  TRIG_00601928       
------------------------------------------
 
Foreground time interval of the image:
  0.000 447.855 (delta_t = 447.855 [sec])
449.000 943.300 (delta_t = 494.300 [sec])
944.000 963.090 (delta_t =  19.090 [sec])
Background time interval of the image:

Lightcurves

Notes:

1 s binning

From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval

64 ms binning

Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 447.854700
449.000000 943.300000
944.000000 963.090000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.31748     ( -0.390801   0.452125 )
Norm@50keV  : 8.20149E-05    ( -2.9533e-05   3.43187e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.96 using 59 PHA bins.
# Reduced chi-squared =          1.455 for     57 degrees of freedom 
# Null hypothesis probability =   1.399664e-02
 
Photon flux (15-150 keV)    in 961.2 sec: 2.86756E-02 ( -0.0042915  0.00431158 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11434e-06 ( -2.08808e-07  2.26825e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 447.854700
449.000000 943.300000
944.000000 963.090000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.39413     ( -8.53689   2.65866 )
Epeak [keV] : 18.6150      ( -6.54975 4.52081 )
Norm@50keV  : 2.06719    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.80 using 59 PHA bins.
# Reduced chi-squared =          1.336 for     56 degrees of freedom 
# Null hypothesis probability =   4.734928e-02
 
Photon flux (15-150 keV)    in 961.2 sec: 2.80186E-02 ( -0.0040597  0.0040829 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.45981e-07 ( -1.53034e-07  1.68069e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 447.854700
449.000000 943.300000
944.000000 963.090000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.49443   ( -2.94803   -2.42583 )
beta        : -6.23216    ( 6.18694   2.48489 )
Epeak [keV] : 19.2048      ( -2.66138 2.46712 )
Norm@50keV   : 15.8200    ( -15.0201   114.692 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.66 using 59 PHA bins.
# Reduced chi-squared =          1.357 for     55 degrees of freedom 
# Null hypothesis probability =   4.001758e-02
 
Photon flux (15-150 keV)    in 961.2 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 4.60594  (-0.593735  0.675537)
R^2/D10^2   : 0.373313  (-0.180058   0.365957)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.92 using 59 PHA bins.
# Reduced chi-squared =          1.314 for     57 degrees of freedom 
# Null hypothesis probability =   5.593687e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.210e-07   2.110e-07
25- 50  3.294e-07   1.208e-07
50-150  8.856e-09   6.854e-09
15-150  9.593e-07   2.520e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 13.0645       (-3.09846      4.46194)
Norm        : 0.617479       (-0.205981     0.368728)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.66 using 59 PHA bins.
# Reduced chi-squared =          1.362 for     57 degrees of freedom 
# Null hypothesis probability =   3.579044e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.017e-07   1.391e-07
25- 50  3.579e-07   1.284e-07
50-150  4.742e-08   3.336e-08
15-150  1.007e-06   2.614e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.60437        (-1.14221      0.672978)
R1^2/D10^2  : 0.373514        (-0.179548      0.563109)
kT2 [keV]   : 199.096        (-198.954      -198.954)
R2^2/D10^2  : 1.38617E-07    (-1.47925e-07   0.737655)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.89 using 59 PHA bins.
# Reduced chi-squared =          1.362 for     55 degrees of freedom 
# Null hypothesis probability =   3.849402e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.206e-07   1.835e-07
25- 50  3.302e-07   1.215e-07
50-150  4.404e-08   6.720e-09
15-150  9.949e-07   2.660e-07

Peak spectrum fit

Power-law model
Time interval is from  944.000 sec. to  963.090 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.31748     ( -0.390801   0.452125 )
Norm@50keV  : 8.20149E-05    ( -2.9533e-05   3.43187e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.96 using 59 PHA bins.
# Reduced chi-squared =          1.455 for     57 degrees of freedom 
# Null hypothesis probability =   1.399664e-02
 
Photon flux (15-150 keV)    in 961.2 sec: 2.86756E-02 ( -0.0042915  0.00431158 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11434e-06 ( -2.08808e-07  2.26825e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  944.000 sec. to  963.090 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.39413     ( -8.53689   2.65866 )
Epeak [keV] : 18.6150      ( -6.54975 4.52081 )
Norm@50keV  : 2.06719    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.80 using 59 PHA bins.
# Reduced chi-squared =          1.336 for     56 degrees of freedom 
# Null hypothesis probability =   4.734928e-02
 
Photon flux (15-150 keV)    in 961.2 sec: 2.80186E-02 ( -0.0040597  0.0040829 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.45981e-07 ( -1.53034e-07  1.68069e-07 ) ergs/cm2
 
Band function
Time interval is from  944.000 sec. to  963.090 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.49443   ( -2.94803   -2.42583 )
beta        : -6.23216    ( 6.18694   2.48489 )
Epeak [keV] : 19.2048      ( -2.66138 2.46712 )
Norm@50keV   : 15.8200    ( -15.0201   126.101 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.66 using 59 PHA bins.
# Reduced chi-squared =          1.357 for     55 degrees of freedom 
# Null hypothesis probability =   4.001758e-02
 
Photon flux (15-150 keV)    in 961.2 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 4.60594  (-0.593735  0.675537)
R^2/D10^2   : 0.373313  (-0.180058   0.365957)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.92 using 59 PHA bins.
# Reduced chi-squared =          1.314 for     57 degrees of freedom 
# Null hypothesis probability =   5.593687e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.210e-07   1.643e-07
25- 50  3.294e-07   1.038e-07
50-150  8.856e-09   6.837e-09
15-150  9.593e-07   2.637e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 13.0645       (-3.09846      4.46194)
Norm        : 0.617479       (-0.205981     0.368728)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.66 using 59 PHA bins.
# Reduced chi-squared =          1.362 for     57 degrees of freedom 
# Null hypothesis probability =   3.579044e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.017e-07   1.574e-07
25- 50  3.579e-07   1.214e-07
50-150  4.742e-08   3.366e-08
15-150  1.007e-06   2.475e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.60437        (-1.27795      0.673013)
R1^2/D10^2  : 0.373514        (-0.179548      0.562766)
kT2 [keV]   : 199.096        (-198.954      -198.954)
R2^2/D10^2  : 1.38617E-07    (-1.47925e-07   0.737655)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.89 using 59 PHA bins.
# Reduced chi-squared =          1.362 for     55 degrees of freedom 
# Null hypothesis probability =   3.849402e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.206e-07   1.796e-07
25- 50  3.302e-07   1.134e-07
50-150  4.404e-08   7.271e-09
15-150  9.949e-07   2.650e-07
Plot creation:
Wed Jun 18 03:09:47 EDT 2014